The Infinite Paintbrush

There is no paintbrush that goes to infinity. Why not? Well, because we we have telescopes, we would see it. Or even if it's not outside of our observable universe, it could just be sort of existing somewhere in space that our telescopes haven't looked yet. That's why you'd have to formulate your beliefs in the base of evidence as opposed to it's perfectly reasonable to hypothesize infinitely long paintbrushes and infinite regresses.